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GCSE Chemistry · key term
The gradual destruction of a metal by chemical reactions with substances in its surroundings.
Used by AQA, Edexcel and OCR
Specification 4.10.3.1, 4.10.3.2 · Paper 2
The destruction of a material by chemical reactions with substances in its environment.
Revise: Corrosion and PreventionA metal object may gradually be damaged because it reacts with substances around it. This chemical destruction is called corrosion. Rusting is one example: it affects iron and steel.
The gradual destruction of a material through chemical reactions with substances in its environment.
Specification 5.2C, 5.4C, 8.12 · Paper 1, Paper 2
The gradual deterioration of a metal as it reacts with substances in its environment.
Revise: CorrosionA metal object can change slowly when its surface reacts with substances around it. This gradual deterioration is corrosion. The key chemical change is oxidation: metal atoms react and form compounds, often by combining with oxygen.
The gradual damage of a metal by chemical reactions with its surroundings.
The gradual damage to a metal caused by chemical reactions with its surroundings.
Specification C6.1p, C6.1q · Paper 2 (Foundation), Paper 4 (Higher)
The gradual deterioration of a metal as it reacts with substances in its surroundings.
Revise: Corrosion ProcessesA metal object may change slowly when its surface reacts with substances around it. This chemical deterioration is corrosion: metal at the surface is changed into new substances, so the object can lose its appearance or useful properties. Oxygen in air commonly reacts with metals to form metal oxides.
The gradual deterioration of a metal through chemical reactions with its surroundings.
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
The gradual destruction of a metal through chemical reactions with substances in its surroundings, commonly involving oxidation by oxygen.
Revise: Corrosion and preventionMetals are used for structures, vehicles, tools and many other products, but their surroundings can gradually react with them. This chemical deterioration is corrosion. For many metals, corrosion involves oxidation: the metal combines with oxygen to form a metal oxide.
Do not say that all metals rust. Rusting is corrosion of iron or steel; other metals can corrode in different ways.
Link each property directly to the use. For example, stainless steel is suitable for cutlery because it is hard and resistant to corrosion.
Do not call the corrosion of every metal ‘rusting’: rusting refers specifically to iron or steel.
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